This year Randy paid $$28,450$ of interest on his residence. $($Randy borrowed $$456,000$ to buy

his residence, which is currently worth $$506,000.)$ Randy also paid $$2,650$ of interest on his car

loan and $$4,425$ of margin interest to his stockbroker $($investment interest expense$).$ How much

of this interest expense can Randy deduct as an itemized deduction under the following

circumstances?

b$.$ Randy had no investment income this year, and his AGI is $$75,000.$